Some are professional societies and some are membership organizations of dedicated amateurs.

• American Association of Variable Star Observers
• American Astronomical Society
• American Lunar Society
• American Society for Gravitational and Space Biology
• Association of Lunar and Planetary Observers
• Astronomical Society of the Pacific
• British Astronomical Association
• Canadian Astronomical Society
• European Low Gravity Research Association
• International Astronomical Union - IAU
• International Dark Sky Association
• International Occultation Timing Association
• International Meteor Organization
• National Space Society
• North American Meteor Network
• The Planetary Society
• Royal Astronomical Society